feat: clear command support

Author: zhangmo8

src/commands/clear.ts

@@ -0,0 +1,5 @@
+import { useGitPanelView } from '@/views/webview'
+
+export default function clearCommand() {
+  useGitPanelView().clearSelection()
+}

src/commands/index.ts

@@ -2,12 +2,14 @@ import { useCommands } from 'reactive-vscode'
 
 import refreshCommand from './refresh'
 import diffCommand from './diff'
+import clearCommand from './clear'
 
 import { EXTENSION_SYMBOL } from '@/constant'
 
 export function initCommands() {
   useCommands({
     [`${EXTENSION_SYMBOL}.history.refresh`]: refreshCommand,
     [`${EXTENSION_SYMBOL}.openDiff`]: diffCommand(),
+    [`${EXTENSION_SYMBOL}.history.clear`]: clearCommand,
   })
 }

src/constant.ts

@@ -9,6 +9,7 @@ export const WEBVIEW_CHANNEL = {
 // vscode to webview channel
 export const CHANNEL = {
   HISTORY: 'history',
+  CLEAR_SELECTED: 'clear-selected',
 }
 
 export const EXTENSION_SYMBOL = 'git-panel'